Quantitative 2D seismic interpretation using seismic and petrophysical data of Sanghar area lower Indus basin, Sindh, Pakistan (T-1509) (MFN 4300)

Abstract

The area under study is located near city of Tando Allahyar in Sanghar district, Sindh Province. Study area is present in the lower Indus Basin. This field was discovered by OGDCL in Sinjhoro Exploration Lease. Acquired seismic and well data for research project includes SEG Y’s of seven seismic lines, LAS file for the well namely “CHAK63-01’’, well tops in soft copy and petrophysical logs. The key objective of this project is to delineate the subsurface geometry with the help of different seismic techniques in order to understand the petroleum system of the concerned area. Main emphasize is on interpretation methodology adopted in order to illustrate the horizons and faults. Beside this time and depth contour maps were also generated along with petrophysical analysis of the well data. Study area is tectonically present in extensional regime. In interpretation main emphasize was on fault identification and marking because faults are important in various aspects, of which foremost is the trap formation and further it facilitates hydrocarbon migration from source to reservoir. Study area of this research project holds all major elements of petroleum system; however some reflectors were not that much distinctive. It was concluded and realized that to interpret various horizons, faults and to improve seismic resolution, a denser seismic grid most likely 3D seismic is required.